2 MECHANICS WERE CLEANING FIRE SUPPRESSION SPRAYS ON SIDE OF MINER. THEY HAD THEIR MANTRIP PARKED BESIDE MINER AT AN INTERSECTION. ALONG SIDE MANTRIP WAS A CANVAS CHECK-FOREMAN WAS OPERATING S COOP, REMOVING GOB FROM FACE OF #1 ENTRY AND HE DROVE SCOOP THROUGH CHECK LIFTING MANTRIP WITH SCOOP PUSHING MANTRIP INTO LEG OF MECHANIC.